Barre-preventing means for looms



April 13,1926.

A. w. MACHLET BARRE PREVENTING MEANS FOR LOOMS Filed April 13, 1925lnuen/or:

5 b flf/amey -a citizen of the United States,

tion clutch usually consists carried "around the drum usually weightedand otherwise controlled lloosen just it; they hold 7 traveling betweenthe separated sheets of a Patented Apr. 13,1926.

nnonrn w. MAGHLET, or EtrzABn'rH, new JnnsEY.

Balms-P EVE TING MEANS ronLo01vis.

App1ication filed April 13, 1925. Serial No. 22,773.

To alt whom, it may concern:

Be it linown that I, AnoLrr-r \V. MAOI"I LET,

Elizabeth, in the county of Union and State oit Ne' .v lersey, haveinvented certain new and useiul Improvements in Barre-Preventing lvleansfor Looms, of which the following is a specification.

This invention relates to the brakes and brake-drums which are used inlooms 'lor alternately restraining" and releasing the warp-threa t le;the drum paying 01f the warp at intervals.

It is customary to employ a brake in the term a "friction clutchconnected to the" drum or spool which carries warp-threads. The brakecomes into play automatically whenthe warp opens and closes. "he tricotwindings of cord or 'rope,these windings being usually in a manner torelieve the longitudinal tensionof the brake-rope at intcrvals, tor thepurpose ot loosening the coils thereof on the drum, thereby releasingthe 'druinaas re- 'quired during the weaving operation; this releaseusually occurring once. .for "every throw of the weaving shuttle.

In weaving a narrow sill;

windings or loights ot the rope'may be taken around the brake-drum, aweight being at-, tached to one end of the rope or strap. For

a wider ribbon there may bethree windings, and so on, suitable meansbeing provided torcontrolling the ropes, automatically tensioning anddete'nsioning the same. "lVhen the brake or clutch is loose, it is onlydesired to; given slack; but the automatic device inustieliably let thebrake-loose, so" that an open. The ropebrake should for" atouch;"and'tl1e warp must en or spread up and down, and then-the thewarp e break must grip again, to be wound. The ropes are solelytorputting a brake on the drum and tor-releasing the drum while thebobbin is warp-threads, and then the drum is released, so as to permitthe transpositionof the warp-threads preparatory to another opera- .tionof the shuttle,

Trouble is experienced becausethe brakecannot be'depended upon ineveryinstance. It should release the drum when the warp is pulled up.'llhis-is residing 1n itself: The rope is I smooth-ed, but it is exposedribbon, two

travel otthe rope,

because the warpfhas operation; and the .to release properly Other thetime when the bar comes in to press the thread up against the precedingthreads. If

the release not properly efi'ected, a miss will be made, and this missmay last through one to four shuttle operations, with .the re&

sult that the spacing of the warp-tl-u'eadsis rendered 'uneven,'o1;'what 'is linown in the trade as a barre is produced. I The failure ofthe brake to ettiect a release, subjects the warp to a strain. The warpmay be strained sufficiently to overcome the friction of the brake.lVhen the brake does vfinally let go,

it exceeds itsnorinal act-ion, and that results 111 unevenness orirregularity oi weaving;

This trouble is serious, inasmuch as silk or otheriline productscontaining these barres or lnirre niarlcs have to be sold at one-halt orevena smaller traction of the selling price of perfect goods,althoughth'e cost to the manufacturer" is the same.

The (lltllll lS HELL-i6 Of CttSl'rllOll lVlllCll .lS

t0 CliLll'lPllGSS filltl rust, and it has been proposed to etl'ect acure' lfor the' stlclting of the brake by im provingthelinish ot thedrum, to make it smooth and liable to rust. k I

k In overcoming this fault of improper release otthe brake, I havediscarded the "theory that the fault ofsticking is due to adhesion ofthe drum'to therope-coils, and have sticking or seizing of therope-coils upon devised means for preventing sidewise one another. Intautening the rope, there 18 a slightendwise movementthereot in eachcell relatively to the next; and at thereleasing operation I haveprevented the seiz- ,1ng o'tonecoil upon another which-has heretheendwise slackenlng I tot'ore prevented so that the same has heretoforereinained tightly clenched upon the Idru1n,-although its dangling endhas been slack; The drum is usually of large diam; I

rope requiredfto wind 'eter, and the length of two or-more tnnesaroundthe same is con s1derable,an-d throughout 1ts length there is somerelative movement or the rope at each tightening" operation, andrelative slackening of the rope at .each releasing tacecontact throughsuch a longflengt h of rope is too extensive to. be easily overcome,wherefore the brake has re inainedin its taut-ened condition, whereasaccording to my invention the brake releases instant-ly.- 1

features and advantages will herelnat'ter appear.

In the accompanying drawings or diagrams,

Figure l is a front elevation of the workcontrolling brake-drum of aloom, showing the present impr vements placed thereon.

Figure 2 is a side elevation 01:" the drum, showing the elativepositions of the parts seen at Figure 1.

Figure 3 is a perspective view of a hel1cal spacing collar, forming anew article of manufacture and ready to place upon the drum.

According to the present invention required prompt slackening of thewindings of rope 10 is provided for by means of a novel device whichrenders impossible the seizing of one coil by the next, even to theslightest degree. This is effected by means of a collar which is placedloosely upon drum 11, and which has the form 01 a helix or worm 12whichwiuds around the drum between the coils 13 of rope, thus separatingsaid coils from one another. Preferably the whorls A or the helixalternate with the windings whorls 13 the rope, so that each coil 13 isalways separate from the next, and ca ot possibly catch thereon;although the i vent-ion may be carried out in a variety of other ways.

The coil-separating collar may be in the.

form oi. a smooth strip 01. steel or other metal. l or example, it maybe in the form of a flat wire three-quarters or seveneighths of an inchwide, and one-eighth of an inch thick. This may be wound up edgewise tomake a helix which is placed loosely in the form of a collar upon thedrum 11, or upon each of the brake-drums 14 fixed upon the ends of thewarp-drum or spool 11. The whorls A of this helical collar are spacedeach from the next, thereby to form, with the drum 1%, channels or bedsfor the coils 13 of rope, said rope-coils being thus spaced by thewhorls of the collar. The level separating collar prevents the coils ofrope from seizing or chafin upon one another, and thereby insures promptreleasing action of the brake, and hence avoids great losses heretoforesuffered through faulty weaving.

Each brake-drum 14: has flanges 15 which confine the rope-coils, and thenovel collar may be placed upon said drum between said flanges. Thecollar may be gradually worked or vornied, point first, over thedrum-flanges, and into position upon the drum, by a sort ofcork-screwing action, the material of the collar being springy andyielding a little to permit it to be forced over the flange and onto thebrake-drum, whereby the novel separator may be placed in positionwithout taking down any part of the loom. Said flanges 15 will thenconfine the spacing collar, as well as the ropewindings. As many coilsof rope may be provided for as required, by making a correspondingnumber of whorls A in the collar; and such collar will be useful alsofor any smaller number of coils of rope.

in order to prevent the spacing collar from turning around with thedrum, said collar may be provided at one end with a pendent extension'16, having an eye 17 through which the pendent rope is passed, saidextension forming an arm which enables the pendent rope to retain thecollar in one place upon the drum, or prevents it from turning idlyaround the drum, which revolves when released from the brake.

This extension 16 may stand at any angle. Sometimes one oi the ropesgoes over an idler; and the restraining eye 17 may be provided for in avariety of ways. This eye is not needed on both ends of the spacingcollar.

The helical separators, Figure 1, form a pair, preferably right and lei.

The invention has great value in making the finestgrade of cloth. It canbe used for cotton as well as silk, especially where an imitation ofsilk is produced from cotton.

Variations may be resorted to within the scope of the invention, andportions of the improvements may be used without others.

Having thus described my invention, I claim:

1. In a loom having a brake-drum controlling the warp-threads, and arope coiled repeatedly around the drum and provided with releasabletension means, a device preventing the rope coils from chafing oneanother, said device in the form of a helix loose upon said drum andseparating the coils of rope one from another.

2. In a loom having a brake-drum controlling the warp-threads, and arope coiled repeatedly around the drum and provided ,with releasabletensioning means, a device preventing the rope coils from chafing oneanother, said device in the form of a helix loose upon said drum andseparating the coils of rope one from another, and means preventing thehelix from revolving with the drum.

8. In a loom having a brake-drum controlling the warp-threads, and arope coiled repeatedly around the drum and provided with releasabletensioning means, a device preventing the rope coils from chafing oneanother, said device in the form of a helix loose upon said drum andseparating the coils of rope one from another, said helix having anextension engaged by one end of the rope, preventing the helix fromturning around the drum.

i. In a loom having a brake-drum controlling the warp-threads, a ropecoiled repeatedly around the drum in contact therewith and provided withreleasable tensioning means, and means loose upon said drum andpreventing the rope coils where in contact with the drum from se zingone another."

5. A pair of helical rope-separating collars loosely mounted upon thewarp-controlling 1 brake drum of a loom, and means for preventlng thecollars from revolving, said collars being formed with right and lefthelices, and each having at one end an eye through which the rope passesand by which the collar is prevented from turning with the drum. t 4

8. The combination with the warp-controlling brakedrum ofa loom, ofguides for the coils of brake rope upon the drum, comprising helicaldevices separating the coils and carried by the drum but non-rotativetherewith. V V a 9. The combination with the warp-controh lingbrake-drum of a loom, of guides for the coils of brake rope upon thedrum, comprising helical devices separating the coils, and means tosupport said coils without permitting them to revolve with the drum.

10. A helical device permanently inserted of rope upon the loom.

between the coils of rope upon a brake-drum to separate. the: same, andmeans preventing said device from revolving with the drum.

'11. A strip of metal formed-into a helix having separated whorlsandconfined between the flanges of the warp-controlling brake-drum of aloom, means being provided for restraining the helix from revolving withthe drum. I

loose helix forming a collar having its whorls separated to formspaces'for coils of rope uponthe warp-controlling brakedrum of a loom,and having means whereby the collar may be restrained against rotation.r

13'. As a new article of manufacture, a

loose helix forminga collar having its whorls separated to form spacesfor coils of rope upon the warp eontrolling brakedrum of a loom, andhaving means whereby the collar may be restrained against rotation, saidrestraining means in the form of from one end of the collar.

an eye projecting 12. As anew article'of manufactureya 14h As a newarticleof manufacture, a

loose helix "forming a collar having its whorls separated to form spacesfor coils the warp-controlling brakesaid helix "formed of a drum of aloom, springy metal capable of being wormed into positionbetween theflanges oi the brakedrum while the same remains in place upon ADOLPH w.MAOHLET.

